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Tropical Animal Health and Production

, Volume 45, Issue 4, pp 1051–1054 | Cite as

Investigation in early growth traits, litter size, and lamb survival in two Iranian fat-tailed sheep breeds

  • Hadi Atashi
  • Jamshid Izadifard
  • Mohammad Javad Zamiri
  • Amir Akhlaghi
Short Communications

Abstract

In the present study, 1,635 lambing records of Ghezel (n = 766) and Mehraban (n = 869) breeds were used to evaluate the early growth traits, litter size, and lamb survival in sheep reared in Fars Province, southern Iran, during a 5-year-long period. The least squares means (± SE) of lamb birth weight for Ghezel were 5.27 (±0.22), 5.02 (±0.22), and 3.98 (±0.23) kg for single males, single females, and twin lambs, respectively; whereas, the corresponding values for Mehraban were 4.39 (±0.18), 4.18 (±0.18), and 3.50 (±0.19) kg. The least squares means of pre-weaning lamb growth (gram per day) for Ghezel were 239 (±15), 218 (±15), and 181 (±16) for single males, single females, and twin lambs, respectively, and the corresponding values for Mehraban were 204 (±12), 187 (±12), and 156 (±13). Lambs from 2 year old ewes or younger were on average lighter at birth and at weaning and had a lower average daily gain than those from older ewes (P < 0.05). The percentage of twin births increased from 1.1 and 1.3 % for ewes aged ≤ 2 years to 19 and 12 % for those aged ≥ 6 years old in Ghezel and Mehraban, respectively (P < 0.05). The mean pre-weaning lamb mortality was 7.1 and 4.1 % for Ghezel and Mehraban, respectively.

Keywords

Body weight Litter size Lamb survival 

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Copyright information

© Springer Science+Business Media Dordrecht 2012

Authors and Affiliations

  • Hadi Atashi
    • 1
  • Jamshid Izadifard
    • 1
  • Mohammad Javad Zamiri
    • 1
  • Amir Akhlaghi
    • 1
  1. 1.Department of Animal Science, College of AgricultureShiraz UniversityShirazIran

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